Modified feedback linearization controller for pneumatic system with non negligible connection port restriction

Abstract

Absmucf-This paper presents an approach to design a nonlinear controller for a pneumatic cylinder system for which the connection port comprises a non-negligible restriction. The pressure chamber of this system is difficult to control because the servo valve and the connection port form a double restriction. This double restriction causes a singularity in the feedback linearization Controller. To avoid this singularity, a m o w e d feedback linearization controller is proposed. The Linear Matrix Inequality @MI) approach is then used to calculate the controller gains which ensure the stability of the tracking error and the non-singularity of the control law. Simulation results show good performance of the proposed controller.

A Study on Modeling of Pneumatic System for an IDC Device

“…As mentioned above, the thermodynamic model is obtained from inlet flow rate and the change of cylinder volume. The inlet flow rate is also the flow rate of pressure valve, expressed as equation [9] with the pressure of cylinder chamber1 is   and supply pressure   is outlet of pressure regulating valve: (9) Where,   is orifice area of pressure regulating valve outlet way and   is flow rate coefficient (0.95). And piecewise flow function   is:…”

“…Yi Wang and Hao Su [8] presented a modeling of piezo-electric pressure regulating valve for MRI with three sliding mode control schemes. Bigras, Khayati and Wong [9]recommended a modified feedback linearization controller for avoiding the singularity in Matlab/Simulink. Carneiro and Almeida [10] used reduced-order models to describe the pressure prediction effected by temperature and heat transfer.…”